#pragma once

#include <iostream>
#include <unordered_map>
#include <functional>
#include <ctime>
#include <sys/types.h>
#include <unistd.h>

using task_t = std::function<void()>;

class TaskManger
{
public:
    TaskManger()
    {
        srand(time(nullptr));
        tasks.push_back([]()
                        { std::cout << "sub process[" << getpid() << " ] 执行访问数据库的任务\n"
                                    << std::endl; });
        tasks.push_back([]()
                        { std::cout << "sub process[" << getpid() << " ] 执行url解析\n"
                                    << std::endl; });
        tasks.push_back([]()
                        { std::cout << "sub process[" << getpid() << " ] 执行加密任务\n"
                                    << std::endl; });
        tasks.push_back([]()
                        { std::cout << "sub process[" << getpid() << " ] 执行数据持久化任务\n"
                                    << std::endl; });
    }

    int SelectTask()
    {
        return rand() % tasks.size();
    }

    void Excute(unsigned long number)
    {
        if (number > tasks.size() || number < 0)
            return;
        tasks[number]();
    }

    ~TaskManger()
    {
    }

private:
    std::vector<task_t> tasks;
};

TaskManger tm;

void Worker()
{
    while (true)
    {
        int cmd = 0;

        //输入任务码
        int n = ::read(0, &cmd, sizeof(cmd));
        
        //执行特定任务码的任务
        if (n == sizeof(cmd))
        {
            tm.Excute(cmd);
        }
        else if (n == 0)
        {
            std::cout << "pid: " << getpid() << " quit..." << std::endl;
            break;
        }
        else
        {
        }
    }
}
